Combined



Dec. 25, 1928. L69632 F. L. BANE COMBINED MEASURING AND DRAFTINGINSTRUMENT Filed Aug. 8, 1925 2 Sheets-Sheet l m vww e 0 @.0 ed

1 :s .N asaOQQOO \h ATTORNEY WITNESS:

Dec 25, 1928.

F. L. BANE COMBINED MEASURING AND DRAFTING INSTRUMENT Filed Aug. 8, 19252 Sheets-Sheet 2 ffmm a 72 e INVEN-ron ATTORN EY WITNESS:

Patented Dec. Z5, lgZS.

narran r'sv FERMAN L. BANE, OF CINCINNATI, OHIO.

COMBINED IVIEASURING AND DRAFTING INSTRUMENT.

Application filed August 8, 1925. Serial No. 49,051.

My present invention has reference to a combined measuring and draftinginstrument.

An object is the provision of an instrument of this character whereby abody may be divided into a desired number of equidistantly arrangedspaces in a single operation and also wherein the instrument may besuccessfully employed as an ordinary or as a beam compass.

A further object is the provision of an instrument especially adaptablefor laying out geometrical lines for drafting sheet metal patterns,spacing holes for rivets in sheet metal, obtaining the girth length otsheet metal patterns prior to the rolling of the same into pipes, andfor other genera layout work and in which a lazy-tongs system isemployed, the same having adjustably secured to its end points, whilethe adjacent arms of each pair of levers comprising the system areprojected beyond the remaining arms and have their ends termed with twosubstantially V-shaped points7 whereby either of the points, or thecenter between the points may be employed for obtaining desiredmeasurement of spaces and also wherein means is provided for minutelyadjusting the levers constituting the system for insuring accuracy inobtaining measurements, and further kwherein all of the measurements areobtained at a single operation, thus resulting in the material saving oftime and labor.

A still further object is the provision of an instrument of thischaracter having points at the ends of a lazy-tongs system thatconstitutes the instrument proper and wherein the said points arenormally housed in suitable guards for preventing injury thereby to theuser oi the instrument.

With the above broadly stated objects in view and others which willpresent themselves as the nature of the invention is better understood,reference is to be had to the drawings which accompany and form part ofthis application.

In the drawings n Figure l is a side elevation of an instru- `ment inaccordance with this invention.

Figure 2 is asimilar view but showing the lazy-tongs system constitutingthe body of the system folded. Y

Figure 3 is a sectional view on the lin 3 3 of Figure 5.

Figure l is a sectional View, on an enlarged scale, and takenapproximately on the line 1 -l of Figure l.

Figure 5 is an end view of the improvement.

Figure 6 is a sectional view through the guard for one of the points.

Figure 7 is a fragmentary plan view looking toward one end ot theimprovement to disclose the manner in which a pencil or scriber may beremovably attached thereto.

The body of the improvement is in the nature oi' a lazy-tongs system,the levers constituting the same being iiat and of determined widths andthicknesses. For distinction the series of levers on one side of thebody are indicated by the numerals 2 and those on the opposite side bythe numeral 3. The pairs ot' cross levers 2 and 3 are centrally pivoted,as at 4, and the said levers adjacent tortheir ends are likewisepivoted, as at 5. Each of the end levers 2 and 3 are pivotally securedto blocks 6 and 6, respectively. These blocks each have an aligningopening and through these openings there is passed a rod 7 that has oneof its ends pointed, as at 8. For convenience the rods 7 willhereinafter be referred to as the points of the instrument. The pointedends 8 of the members 7 are received in substantially rectangular guardsor housings 9 that are preferably constructed of a single piece ofsuitable metal, the outer elements of which being extended and securedto the lower blocks 6. rlihe blocks 6 have threaded openings thatcommunicate with thc bore through which the members 7 pass and in theseopenings there are threaded thumb screwsA l0. By this arrangement thepoints may be retained in the housing or projected through an opening inthe lower wall ef the said housing.

One of the lower blocks 6 has secured vthereon the straight Vend of arounded spring clip l1. The securing element l2 for the clip l1 ispreferably adjustably associated withthe block and the said clip isdesigned to receive therethrough and to bind against the outer face ofthe block 6 a pencil or scriber instrument 18. Then the improvement isemployed as a compass the scriber instrument 13 is not employed.

The levers 3 have their ends projected Vbeyond the lower pivots 5 andtheir said ends have their edges inclined inwardly, as at lil. The endsproper are centrally formed with V-shaped notches 15. Thus the lower iwhich the barend of each of the levers 3 is formed with twosubstantially V-shaped points. Each lever, in a line with the center ofthe notches 15 has inscribed thereon numeral` In the showing of thedrawings twenty-011e levers are employed and the numerals thereon arearranged consecutively 'from O to z(l. Formed integrally with thepivotst ot two of the levers, or having such pivots iiXed thereon areblocks 1-6 and 17, i'espectively. These blocks liavefaligning openingstherethrough, while the opening of the block 17 is provided withcountersunk ends, and through these openings there is passed a rod 18.The bar has one end threaded, as at 19, and this threadediend is passedthrough the block 17. The block 16 has a threaded opening communicatingwit-h the opening through passes, and screwed in this opening is theshankv 0f a thumb screw 20. On the bar 18, at-the portion thereofbetween the'bloclis 1G Vand 17, there is adjustably secured a collar 21,and adjustablv secured on the rod, adjacent to the nonthreaded endthereof, there is a second collar 22. This collar is also adjustable,the elements holding the collars on the rod being preferably screws 28.

Screwed on the threaded end 19 ot the rod 18 there are lock nuts 2.4 and25, the same contacting respectively with the opposite faces of theblock 17. The Anuts 24 and 25 have their confronting ends provided withbosses 26 and 27 respectively, the ends of which are-tapered. Thesetapered ends are received in the countersinks in the ends of the'block17. The bore in block 17 is of a size to `freely receive the threadedend 19 ofthe rod 18therethro'ugh. By this arrangement friction .betweenth-e block and the rod is overcome and the nuts 24C and 25 may benicelyl regulated for the minute adjustment of the instrument.

lVlien the toggle lever system is in fully extended position the collar22 will be brought against the block 16, while the collar 21, contactswith the opposite side of the block 16 when the system is wholly orpartly collapsed. Of course, by adjusting the collars the system may beopened or closed Yto obtain desired distances between the spaces desiredon the material. A minute adjustment for measurements is obtained byadjusting the lock, nuts 24 and 25.

It is to be noted that the levers 3 are twenty-one in number, and arenumbered `consecutively from 0 to 20. `The V-sliaped notches in theouter or lower ends oi' these levers are employed tor spacing andlayiugout or locating holes for rivets in sheet metal work. and also forlocating spaces or lines ter drafting sheet metal patterns or any otherwork required to be equally spaced. After laying out the instrumentacross the sheet to be spaced into a number of equal spaces, a penciloi' scribed is einploy-ed, after, of course, the instrument has beenstretched to the desired space. The pencil orfscri-ber is placed in thenotch in the lever bearing the character O and in the notches oi? theremaining levers required in the spacing operation, and the distancebetween the scribed marks between the levers numbered Oy and 1 is onespace, the distance between the levers numbered 1 and 2 is two spaces,the distance between the levers numbered 2 and 3 is three spaces and soOn, so that it willA be seen that twenty equidistantly marked spaces-maybe thus arranged upon the plate or sheet. lVhen the instrument closedvthere are twice as many notches presented by the levers 3 as when theinstrument is open, the angle walls or inclined edges of the leversprovidingthe additional notches and the distance between :all thenotches is the same.

Then the device is employed as a compass the point adjacent to thesciiber 1'3 isV moved into its guard housing, and the opposite point isemployed 'as a pivot. Circles ot any desired size may be made by theimproif'enieiit. The improvement is especially but .not necessarilydesigned for employmentv tor laying out sheet metal patterns, spacingholes tor rivets and. generallayout worli oit this character.

IIaving described the invention, I claim In an instrument of thecharacter described, a lazy tongs construction comprising pairs of crosslevers pivotally connected between their ends and centrally oi' one ofthe levers of each pair, one end ci each lever of a pair being pivotallyconnected to that of alever ot an adjacent pair, the other end of one ofthe levers of'eacli pair being pivotally connected to a lever ot anadjacent pair .at a point between its central pivotal point and its end,the extending portion of said lever being centrally notched and havingits side edges converging and forming with said notch, points on saidreX- tending end, upper and lower blocks ,at each end of said lazy tongsconstruction havingaligned apertures therein, pointed members extendingthrough said apertures, set screws for holding said pointed members insaid blocks, other blocks pivotally connected centrally to certain ofsaid levers and" in spaced relation to each other, said other blockshaving aligned apertures and a rod extending therethrough and connectedwith one of the lugsby a set screw, lock nuts tlireadedly connected withthe rod on either side of the other lug. f

In testimony whereof I aflix my signature.

reni/nin L. BANE.

